Fastener



Oct. 23, 1934. H. ROSENBERG. '1,978,329

FASTENER Filed Deo. 22 1923 gnou/Hoz Patented oet. 23,1934

UNITED STATES.

FASTENER Heyman Rosenberg, New York, N. Y. Applieetien December 2z, i923, serial Ne. 682,271

4 claims. (c1. 85-21) This invention relates to improvements in fasteners, such as are especially well adapted for anchorage in metal or the connecting of two pieces of metal, and which are also'well adapted for use in conjunction withother materials.

The object in view is the production of a simple and inexpensive, 'and yet very effective, means of anchorage or connection.

With this and further objects in view as will in part vhereinafter become apparent and in part be stated, the 'invention comprises certain novel constructions, combinations and arrangements of parts as subsequently specified and claimed.

`In the accompanying drawing- Figure 1 is-a view in side elevation of a fastener embc-lying the features of the present invention, intermediate parts being broken out, and the parts being seen on an exaggerated scale over the sizes' ordinarily employed in commerce, the magnification being utilized for clearness of d isclosure.

Figures 2,A 3, 4, 5 and 6 are views similar to Figure 1 of diiferent slightly modiiied embodiments thereof.

Figure '7 is a transverse section taken on the plane indicated by line 7-'7 of Figure 3, and looking downward.

Referring to the drawing by numerals, 1 indicates a pin-like body having a driving head v2 at one end and a pilot 3 forming the terminus of the other end of the body. Immediately above the pilot, that is in the direction toward the head, the body is formed with outstanding annular ribs 4, 4, lying parallel to each other and'at substantially right angles to the longitudinal axis of the body. Between the ribs 4 is an annular valley or depression 5, and below the lower rib is an annular depression 6 forming that portionof a valley extending into the body 1'. Each of the ribs 4 has an inclined under face anda nat upper face, so that the upper face lies in a single 'plane intersecting the axis of the pin at right angles. Thus, each rib 4 is a relatively short cone frustum with its base facing upward or in the direction toward the hammer-driven end of the fastener.

The fastener described is preferably formed of iron or 'steel withthe ribs 4 hardened sunlciently for entering metal, such as soft iron or soft steel,

substantially without injury to the ribs. Reference herein and in the appended claixnsto the hardened condition of the ribs 4 is to be understood to include that degree of hardness just mentioned, and to the end of providing this hardened condition, as a matter of facility and commercial practicability, the fastener is preferably formed 'tending to withdraw the fastener.

of soft iron or soft steel and thencase-hardened as by the Well known cyaniding process.

In operation, the fastener may be employed as a means of anchorage to a'. body of iron .or

other material, or asa means of connection or one plate to another, and ineither instance an .aperture or recess is formed in the material to be engaged, the recess-being of a cross sectional area equal to the .cross section ofthe body 1but not equal to the diameter of one of the ribs'4, 65 and in the instance of' a recess, such recess is iormedfof a depth equal at least to the distance to which the fastener is tobe driven in. The pilot 3 is inserted in such aperture or recess, and the -head4 is driven, as 1by a hammer blow or other A,70 requisite stress, for moving the fastener intothe recess or aperture and thereby causing the material engaged to iiow`or move first sufficiently away from the body 1 to permit' the pass-age .of a rib 4, and then to iiow back to a position overlapping such rib and to have a similar, action with respect to the next'rib4. An interlock is thus effected between the fastener and the maf' terial engaged which electively resists `stress It is to be noted that thevalley 5 is of a depth suiilcient to cause its .base to have a diameter less than the diameter of the body 1, and it is also to be understood that reference to direction throughout.` J this specification 'and the appended claims as- 85 sumes the` fastener to be in an upright position.v

In Figure 2 is illustrated a very vslighlt modincation of the fastener from the structure shown and described in Figure L in which the body 1,- p, corresponding to the body 1, is provided with the annular ribs 8 of substantially thasame 'form as ribs 4, except that the -ribs 8 spring Krom the surface or periphery of the body 'I and the valley 9 between the ribs, therefore, does notiextend within the body itself. .cl .95

In Figures 3 and 'I is illustrated a still further embodiment of the fastener in which the body 10 is substantially identical with the body 1, of Figure l, 'and is provided with ribs 11, 11, with a valley 12 therebetween, but in this instance the 100 ribs are not' annular, but are interrupted at a series of places, as indicated at 13. The spaces or interruptions 13 between the segments of the. v otherwise annular ribs 11 enable portions of the engaged material to remain in place and form interlocking longitudinal ribs with portions overlying the several ends of the several segments making up the ribs 11.

Figure 4 shows a structure identical with the showing in Figure 2, except that a greater num 110 ber of annular ribs is employed. In this gure,

the body off the fastener is provided with the usual pilot 14 and from the'u'pper end of the pilot 14 to the head 15 the body of the pin-like.

fastener is providedV with outstanding ribs 16, 16.

The ribs 16 have the usual valleys 17 separating the same.

In Figure 5 is shown a structure similar to Figure 4, but differing therefrom in that the ribs are cut away and thus form segments instead of annular ribs. In this figure, 18 indicates the body 'of the fastener having the pilot 19, and the ribs 20, all of which are interrupted at 2l, 21. The openings 21 -in the length of the ribs leave them in the form of segments, corresponding to the structure seen in Figure 3 and differing therefrom only in the presence of a greater number of 'the ribs.

Referring more particularly to Figure 6, the usual driving head 22 is provided on the body of the pin, and at the opposite end the usual pilot 23 with annular ribs 24, 24, disposed transversely of the longitudinal axis of the pin and in numbers sufficient to extend from the pilot 23 to the head 22. Each rib 24, instead of being formed with a fiat or horizontal surface at its upper face, is provided withan inclined surface of an opposite inclination to that of the under surface. Thus, while the fastener seen in Figure 6 will function substantially the same as the other structures shown, it possesses less capacity for resistance to a withdrawing strain, and, in fact, is intended to enable withdrawal under sufficient stress. Nevertheless the form of the ribs 24 is such as to insure an overlap of the material engaged which will firmly retain the fastener in position and resist a large amount of withdrawingstress.

The process or art of anchoring a fastener in metal work herein disclosed but not claimed is made the subject matter of claim in my co-pending divisional application Serial No. 526,035, led March 28, 1931.

What is claimed-is: Y

1. A fastener for metal work comprising a pin-like body having a cylindricalpilot at its entering end and a non-spiral, c ircumferentially disposed outstanding rib having its entering face inclined toward the pilot, the pilot having a flat entering end, and the rib being hardened suiliciently for entering metal work, suchas soft'lron or soft steel, substantially without injury to the rib.

2. A hammer-driven fastener comprising a cylindrical pin-like b'ody having a series of circumferentially disposed ribs each having a face inclined toward .the entering end of the body hardened suiiiciently for entering metal such as soft iron and soft steel, substantially Without injury to such face, and each of the ribs lying in planes intersecting the axis of the body sub-- stantially at right angles, and each of said ribs beingin'terrupted at a plurality of places to form segments, the places of interruption of one rib being alined with those' of the adjacent rib for exposing rounded portions of the body elongated in the direction of the length of the body.

3. A fastener comprising a pin-like body having a non-spiral, circumferentially extending anchoring rib, the rib being hardened sufficiently for entering metal work, such as soft iron or soft steel, substantially without injury to the rib.

4. A hammer-driven fastener comprising a pinlike body having a generally circumferentiallyextending anchoring rib outstanding from the body With a face inclined toward the entering end of the body and the rib being hardened sufficiently and the pitch of the inclination of the said face of lthe rib being such as to enable the rib to enter I'netal, such as soft iron and soft steel, under the action of a hammer blow against the outer end of the body substantially without 

